diff --git a/frontend/src/pages/LieferantDetail.tsx b/frontend/src/pages/LieferantDetail.tsx
index b958b25..ee39973 100644
--- a/frontend/src/pages/LieferantDetail.tsx
+++ b/frontend/src/pages/LieferantDetail.tsx
@@ -52,6 +52,8 @@ export default function LieferantDetail() {
     if (isNew) {
       setEditMode(true);
       setForm({ ...emptyForm });
+    } else {
+      setEditMode(false);
     }
   }, [isNew]);